Lincoln Service Parts 1 › Lincoln Electric 9SM31321 LINE SWITCH ASBLY M31321 Lincoln Electric 9SM31321 LINE SWITCH ASBLY M31321 Sale Price: $137.43 Original Price: $158.05 LINE SWITCH ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! LINE SWITCH ASBLY PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1